Elevator-door.



` l Ritt/HannlJRoss, a ited` Statesfot" "America, igorA countyof` Cook,Anted certain in Elexiitorg' fire proof` ele'- ed for freight losure.tor each n tivo parts `which ifted iii` respectively di rections` whenbeing` h `ir operationy easy.

this invention are to struction of the rib door sections and eed awayfrom the i and Utojl yielding d u ieir` `sidewisel shi.

pings` lien they are `eiitaasaii case. of frire. e ibodune.;itaoi` `thisinvenieing taken.; from `the .sainei Fig. `onal` y.View ofthe enlargedsectional de- ED STATESPT or onionsoimmois, `iissisnon To GUARANTY IRON& WIR-E oo., miren;` ILLinois, e CORPORATION oF ILLINOIS. f

lotviiig -lis a spec-ith "t tito seotioiisfbeing con# t 1 and ut'ably`counterbiil-i igated panels to i 'or `retainiiig .the

`ely `:tol fthe; plane l re in, either,`

o irs so as to `pre- Y ireleration of an ele- 1 '1g the"4 foregoinginiloo the section being o Fig.` 1. Fig. 5 is door nLEVATon-noon.

Patented Mai-.'14, i916.

manga niet Mrcii 23', 191e seriai No. 826,703.y

. i' A caseof fire.` Fig; S 'isa View of the, same taken on the line(Il-EC of Fig. 7.

In the construction shown in the vdrawthe walls or supports 3 boundingthe opening or passageway l, for which they are adapted to Storni a.closure.

the `lower corncrspot' the upper dooi` seetio'ii 1 andA traveling .overpulleys 'l'` and at-` tached to rods S which are-'connected to 'fittings9 secured .to the upper corners of the lower door section 2. Thissuspension ot the door sections'pern'iits them to be `shifted inrelativelyY opposite Ajertical direcings, the door sections 1 and aresliiftahly `mounted on suitable guideways secured to tions `whenbeingmoved to their yopen and closed positions with respect to the opening 4,and `by reason of thel fact that they are connected `.togethertlieiroperation,1s rendered easy.,

Each of the door sections comprises a recl titngular traine foi-'ined ofangle `hars se' cured `together at their ends and@ having braces10extending across the r'ani'es` at points between the sides. betweenwhich and the sides `o't the ranies the corrugated panels 11 arelocated.l The braces or 'ribs 10 are "herein shown to be loriiiedf ofsheet `85 nietal bent to a: `V shaped cross section` with `edge fiangesresting on and attached at their cndsto the inside of the frame anode iEb bars. 'Thecoigi'uga'ted panels 11 are riveted to the. door iframesalong their edges and are. secured to the braces 10 by havingr `theiredges bent over as at 1Q, and interloeked` with the bent over portion 13of thetlangesof the braces 10` and secured together by having the. lientover parts 12 and 13 firmly forced together. as shown inr Fig. 4.

Guidewaysll are formed at opposite sides of the door by means ot anglehars 15 and 16 `secured together and siipportedon the wall or supports 3at the sides ofthe openf ing d, with the fianges 17 ot' the angle barsl15 spaced away from the wall and extending inwardly toward tlierdoor.Angle bars 18 are seeured vto the sides of the door sections 1 and `Qand have the flanges 19 thereof ex; tendinginto theguideways 14 (Figsrand 8'). The edgesgot the flanges 17 andl 19` overlap a short distanceso that their edges are spaced away aconsiderable distance i'e.-

spectivelyi'troin the sides of the doorsectins to vthe other.

1 and: 2, and the angle bars 16. AThe Yoverlapping oi'' the flanges 17and 19 provides a :tortuous path for ilames'to follow in attempting topass from one side of the door The space betweerrthe angesand the sidesof the door sections and the I angle bars is provided so'as to allow for'au considerable sidewise expansion of the door. sections when' they aresubjected to intense heat, as in the case .of fire, and thereby .reducethe possibility of buckling or warpe ing as would be the case wereprovidedfor.

'A tion of the door,

. yieldingly resist the isidewise expansion of if no expansion In order,to prevent sidewise shifting of the door sections during their normalvopera tion, resilient members 20 are secured tov the sides ofthe doorsections and have bowed parts 21 arranged in close proximity to theedges ofthel flanges ,17.` These members allow for suliicient play topermit easy operaand in case of fire will the door' 'sectionsup to thepoint of the owed parts being flattened out against the sidesof thedoor. Thusvwhen' the door becomes cooled and contracts,v the member v2()'Will` assume its normal position, and the door Will'not have beenmaterially injured.

In order to further aid in the preventing of the door sections frombecoming forced away from' the Walls 3, or in oase the expanl" I sionshould exceed vthat allowed for by the *members 20, T-shaped l' aresecured to the walls 3 above and below Lthe opening 4 andA arranged tohave the members :22 and -23 transverse parts thereof extend into theangle of the/brace members 10.' The trans- .I verse parts of the'li-shaped members pro- `vide oppositely disposed shoulders 24.- and 25.when the door'sections are which are adapted to engage the flanges ofand bottom door frame angle bars, in either their open or closedpositions. The shoulders 24 the top -ii the members 23 also assist insecuring the door section 2 from being-forced away from the yadjacentwall 3 when the doors are A the other at the point of their abuttingfaces,

andnin case of fire would necessitate theA flames following a tortuouspath.v

' Although but one specific embodiment of this invention 4has beenherein shown and These depending' ianges 28 and 29 prevent ydirectcommunication from one side of the door sections todescribed, it will beunderstood that numeri ous details of. the construction shown may bealtered or omitted without departlng from the spirit of this inventionas defined by the following claim.

I. claim: yThe combination with suitable upright supports adjacent to anopening, of a ,door

slidably mounted on lsaid supports, said door being shiftable downwardlyto its full open position with the top thereof substantially even withand comprising an exten sion of the ioor forming the bottom of saidopening, coacting means on said supports .and door shaped to enter intointerlocking engagement when said door is shifted'to said full openposition for rigidly supporting the top of said door 4substantiallyflush with said.

Hoor.

RICHARD J. Ross.y

-Witnesses:

EDWIN PHELPS, WM. E. HANN.

soA

